Finding the Fourth Proportional to 11,987.88, 17,989.92 and 4,196.76

Step by Step Solution

1. Step 1: Write the proportion equation
   11,987.88 : 17,989.92 = 4,196.76 : x
2. Step 2: Convert to fraction form
   11,987.88/17,989.92 = 4,196.76/x
3. Step 3: Cross multiply
   11,987.88x = 17,989.92 × 4,196.76
4. Step 4: Simplify right side
   11,987.88x = 75,499,376.66
5. Step 5: Solve for x
   x = 75,499,376.66/11,987.88
6. Step 6: Final answer
   x = 6,297.98